<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0//EN" "http://www.w3.org/Math/DTD/mathml2/xhtml-math11-f.dtd" >

<html xmlns="http://www.w3.org/1999/xhtml">

<head>
<link rel="help" href="https://w3c.github.io/mathml-core/#subscripts-and-superscripts-msub-msup-msubsup"/>
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=345563"/>
<link rel="mismatch" href="sub-vs-sup-mozilla-345563-ref.xhtml"/>
<meta name="assert" content="Subscript should not render the same as superscript."/>
</head>

<body>

<p>
  <math xmlns="http://www.w3.org/1998/Math/MathML">
    <msub>
      <mi>x</mi>
      <mn>2</mn>
    </msub>
  </math>
</p>

</body>

</html>
